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SubjectRe: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based on semi-formal proof"

* Paul E. McKenney <> wrote:

> rcu: Start RCU kthreads in TASK_INTERRUPTIBLE state
> Upon creation, kthreads are in TASK_UNINTERRUPTIBLE state, which can
> result in softlockup warnings. Because some of RCU's kthreads can
> legitimately be idle indefinitely, start them in TASK_INTERRUPTIBLE
> state in order to avoid those warnings.
> Suggested-by: Peter Zijlstra <>
> Signed-off-by: Paul E. McKenney <>

this should also solve load average artifacts - do not
TASK_UNINTERRUPTIBLE tasks skew the load upwards?



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